Friable, frothy, columnar jointed pumiceous outcrop near Surpise Lake. Possible surface  texture of a subaqueously emplaced lava dome ("pumice dome"), Aniakchak caldera.

Friable, frothy, columnar jointed pumiceous outcrop near Surpise Lake. Possible surface texture of a subaqueously emplaced lava dome ("pumice dome"), Aniakchak caldera.

Date: Jul 6th, 1992
Volcano(es): Aniakchak Surprise Lake
Photographer: Neal, C. A.
URL: avo.alaska.edu/image/view/10435
Image courtesy of AVO/USGS.
Please cite the photographer and the Alaska Volcano Observatory / U.S. Geological Survey when using this image.
Full Resolution.